I just got a real answer, kind of, from RAM Chat. Ordered my 3500 HO on 10/6/2020. 10 weeks tomorrow. Week after week, the same thing: we are assembling and gathering all the parts necessary to build your truck. Could never get a Build Date. Then just now: your truck is in the "Trim Stage". I asked what that meant? Reply, final assembly stage. So, it went form not knowing when it was going to get built as late as last Friday, to today, 3 days later where its almost done.
My Dealer did tell me he expects it in the local rail yard on 1/9/21. Even sent me the notofication he got from FCA and sure enough, no build date info, but a date when it will be in the damn rail yard. There is hope!!